Dear Claus,
are you sure your constant is zero? Its colour does not tell you anything
about the actual value, you need to find out about this using "review
design" and browsing the design matrix (I believe holding down left mouse
and moving your mouse around will print design matrix values).
Things change after model estimation, because then your filtered (in
time resp. non-sphericity) design matrix will be displayed.
Volkmar
On Fri, 27 Apr 2007, Claus Lamm wrote:
> Dear all:
>
> I noticed something 'weird' using SPM5.
> When I set up a model (simple block design, two conditions,
> but this actually happens with all kinds of designs so it doesn't
> seem to matter), the constant term is zero throughout ('white' in the
> visualization, see attachment model_setup.jpg).
>
> However, after estimating the model, values are around .78 and grey-ish
> (see file: estimated.jpg)
>
> It happens both on my winXP and my Solaris machine.
> And only with SPM5, not with SPM2.
>
> Any thoughts on that?
>
> Claus
>
>
>
>
--
Volkmar Glauche
-
Department of Neurology [log in to unmask]
Universitaetsklinikum Freiburg Phone 49(0)761-270-5331
Breisacher Str. 64 Fax 49(0)761-270-5416
79106 Freiburg http://fbi.uniklinik-freiburg.de/
